Question

36.Which of the following reactions best describes the dissolution of gaseous hydrogen chloride (HCI) in water? A) HCI(g) + 2H20()-> HO+(ay) + CIO-(aq) + H2(g) B) 2HCl(g) → H2(g) + Cldg) C) HCI(g) + H2O() → H30+(aq) + Cl-(aq) D) HCI(g) + 5H20() → HO+(aq) + CIO4-(aq) + 4H2(g) E) HCI(g) + H20() → H60+(aq) + ClO-(aq) 37 uhich ofthe following reactions hest descrihes the acid-base properties of acetic acid
36,46 and 71 please.

Answer 1

36)

HCl gas dissolved in a water and liberates H+ ions and Cl- ions as follow.

Lets show the reaction

HCl(aq) + H2O (l) –--- > H3O+(aq) + Cl- (aq)

So the option C is correct.

46)

Lets write the molecular equation

H2SeO3(aq) + 2KOH(aq) ---- > K2SeO3 (aq) + 2H2O(l)

Total ionic equation

2H+(aq)+SeO3^2- (aq) + 2K+(aq)+2OH-(aq)----> 2K+(aq) +SeO3^2- (aq)+H2O(l)

Write net ionic equation

2H+(aq)+2OH-(aq)---- > 2H2O(l)

So the correct option is C

71)

Reducing agent

The species which helps reducing other species by oxidizing itself is called as reducing agent. Sulfur in H2S undergoes oxidation and so we need to look at the reactions that has oxidation of S.

In reaction E

3H2S(aq)+2H+(aq)+2NO3-(aq) ---- > 3S(s) +2NO(g)+4H2O(l)

Oxidation state of S in H2S is -2 and in S(s) its 0 so S is oxidized and therefore here in this reaction it acts as reducing agent and therefore,

Answer is E.